Sheet manufacturing apparatus

A sheet manufacturing apparatus comprising:

• a screening unit configured to allow a material having fibers to pass through from a plurality of openings and thereby screen the material;
• and
• a forming unit configured to form a sheet by using a passed material that has been screened,
• the screening unit including
• a cylindrical unit that has the openings on a curved surface and is configured to rotate,
• two side units that are located at two end parts of the cylindrical unit which are spaced apart in a direction of extension of a rotation center axis thereof, the side units being configured not to rotate,
• an introduction unit that is provided to one of the side units and is configured to introduce the material to the cylindrical unit, and
• a discharge unit that is provided to the other of the side units, is located downward from the introduction unit, and is configured to discharge a residual material, which is material that does not pass through the openings.